Milwaukee®'s SHOCKWAVE™ Impact Duty™ step bits are engineered to deliver the most durable and fastest holes in the market. Made in the USA with global materials, these step bits have best-in-class performance in impact drivers and the versatility to be used in drills. The 1/4 in. hex shank with an optimized Shockzone™ provide the industry's most durable shank, reducing early shank breaks. A titanium aluminum nitride (TiBone) coating helps deliver 5x longer life, while the Rapid Strike™ tip and dual spiral flute produces 2x faster holes.